The 36-year-old also took off his glove after the fight to show the injury.

According to his contract with Showtime Networks Inc., Mayweather was scheduled to have up to six fights in the next 30 months—the first of which being this fight against Guerrero. What impact the injury will have on those plans still remains to be seen, with no news yet known on the details or severity of the injury.

However, as Steve Kim at Max Boxing suggests, it could well postpone his next fight scheduled for September against an undetermined opponent. Mannix already pointed out above that the star avoided questions about potentially fighting Canelo Alvarez, whom many would love to see square off against Money May, and that this injury may end derail any chances of that fight coming together.

Back to Steve Kim @steveucnlive

uhhh, yeah, Mayweather won... Don't know what to say. Except he says he hurt his hand. So he wont be fighting in Sept #boxing #MayDay

Mayweather's right hand was simply dominant against Guerrero throughout the fight—opening up his opponent with several great jabs during the middle rounds.

According to ESPN Stats and Info, the 36-year-old landed 60 percent of his power punches throughout the fight as he chalked up a 117-111 unanimous-decision victory, with all three judges giving the same score.

It is not yet known in what round Mayweather sustained the injury, but there's little doubt he fought for a significant portion of the fight with the injury—and likely still landed several huge blows in the process.